A novel optical design for planetary surface stereo-imaging: preliminary design of the stereoscopic imaging channel of SIMBIOSYS for the BepiColombo ESA mission

Vania Da Deppo; Giampiero Naletto; Gabriele Cremonese; Stefano Debei; Enrico Flamini

doi:10.1117/12.670286

14 June 2006 A novel optical design for planetary surface stereo-imaging: preliminary design of the stereoscopic imaging channel of SIMBIOSYS for the BepiColombo ESA mission

Vania Da Deppo, Giampiero Naletto, Gabriele Cremonese, Stefano Debei, Enrico Flamini

Author Affiliations +

Proceedings Volume 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter; 626527 (2006) https://doi.org/10.1117/12.670286
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

The optical design of the STereoscopic imaging Channel (STC) of the imaging/spectroscopic system SIMBIOSYS for the ESA BepiColombo mission is presented. The main aim of this system is the global stereo mapping of planet Mercury surface during the BepiColombo mission lifetime. The instrument consists of two identical cameras looking at ±20° from nadir which are sharing some optical components and the detector. The instrument has a 23"/pixel scale factor, corresponding to 50 m/px at 400 km from the surface, on a 4°x 4° FoV; imaging in four different spectral bands, between 540 nm and 890 nm, is foreseen. The STC optical characteristics guarantee global stereo mapping of the whole Mercury surface with all the filters. The coupling of an achromatic air-spaced doublet with a relay lens system allows good aberration balancing over all the field of view: the diffraction Ensquared Energy inside one pixel of the detector is of the order of 80%. In addition, an intermediate field stop gives the possibility of designing an efficient baffling system for straylight rejection. To cope with the hazardous radiation environment in which the spacecraft will be immersed in during the mission, all the glasses selected for the design are rad-hard type. A preliminary tolerance analysis has also been undertaken showing a low criticality level for manufacturing, alignment and stability of the system.

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Vania Da Deppo, Giampiero Naletto, Gabriele Cremonese, Stefano Debei, and Enrico Flamini "A novel optical design for planetary surface stereo-imaging: preliminary design of the stereoscopic imaging channel of SIMBIOSYS for the BepiColombo ESA mission", Proc. SPIE 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter, 626527 (14 June 2006); https://doi.org/10.1117/12.670286

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